<?php  

/**  
* 功能:生成缩略图  
* 作者:phpox  
* 日期:Thu May 17 09:57:05 CST 2007  
*/  
  
class CreatMiniature   
{   
    //公共变量   
    var $srcFile="";       //原图   
    var $echoType;           //输出图片类型，link--不保存为文件；file--保存为文件   
    var $im="";               //临时变量   
    var $srcW="";           //原图宽   
    var $srcH="";           //原图高   
  
    //设置变量及初始化
    function SetVar($srcFile,$echoType)   
    {   
        if(!file_exists($srcFile)){   
           echo '源图片文件不存在!';   
           exit();   
        }   
       $this->srcFile=$srcFile;   
       $this->echoType=$echoType;   
  
        $info ="";   
        $data =GetImageSize($this->srcFile,$info);   
        switch($data[2])    
        {   
         case 1:   
          if(!function_exists("imagecreatefromgif")){   
           echo "你的GD库不能使用GIF格式的图片，请使用Jpeg或PNG格式！<ahref='javascript:go(-1);'>返回</a>";   
           exit();   
          }   
          $this->im =ImageCreateFromGIF($this->srcFile);   
          break;   
        case 2:   
         if(!function_exists("imagecreatefromjpeg")){   
           echo"你的GD库不能使用jpeg格式的图片，请使用其它格式的图片！<ahref='javascript:go(-1);'>返回</a>";   
          exit();   
         }   
          $this->im=ImageCreateFromJpeg($this->srcFile);       
         break;   
        case 3:   
          $this->im=ImageCreateFromPNG($this->srcFile);       
         break;   
      }   
     $this->srcW=ImageSX($this->im);   
     $this->srcH=ImageSY($this->im);    
    }   
       
    //生成扭曲型缩图   
    function Distortion($toFile,$toW,$toH)   
    {   
       $cImg=$this->CreatImage($this->im,$toW,$toH,0,0,0,0,$this->srcW,$this->srcH);   
        return $this->EchoImage($cImg,$toFile);   
       ImageDestroy($cImg);   
    }   
       
    //生成按比例缩放的缩图   
    function Prorate($toFile,$toW,$toH)   
    {   
       $toWH=$toW/$toH;   
       $srcWH=$this->srcW/$this->srcH;   
       if($toWH<=$srcWH)   
        {   
           $ftoW=$toW;   
           $ftoH=$ftoW*($this->srcH/$this->srcW);   
        }   
        else  
        {   
             $ftoH=$toH;   
             $ftoW=$ftoH*($this->srcW/$this->srcH);   
        }   
       if($this->srcW>$toW||$this->srcH>$toH)   
        {   
           $cImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);   
           return $this->EchoImage($cImg,$toFile);   
           ImageDestroy($cImg);   
        }   
        else  
        {   
           $cImg=$this->CreatImage($this->im,$this->srcW,$this->srcH,0,0,0,0,$this->srcW,$this->srcH);   
           return $this->EchoImage($cImg,$toFile);   
           ImageDestroy($cImg);   
        }   
    }   
       
    //生成最小裁剪后的缩图   
    function Cut($toFile,$toW,$toH)   
    {   
         $toWH=$toW/$toH;   
         $srcWH=$this->srcW/$this->srcH;   
         if($toWH<=$srcWH)   
         {   
              $ctoH=$toH;   
              $ctoW=$ctoH*($this->srcW/$this->srcH);   
         }   
         else  
         {   
             $ctoW=$toW;   
             $ctoH=$ctoW*($this->srcH/$this->srcW);   
         }    
       $allImg=$this->CreatImage($this->im,$ctoW,$ctoH,0,0,0,0,$this->srcW,$this->srcH);   
       $cImg=$this->CreatImage($allImg,$toW,$toH,0,0,($ctoW-$toW)/2,($ctoH-$toH)/2,$toW,$toH);   
        return $this->EchoImage($cImg,$toFile);   
       ImageDestroy($cImg);   
       ImageDestroy($allImg);   
    }   
  
    //生成背景填充的缩图   
    function BackFill($toFile,$toW,$toH,$bk1=255,$bk2=255,$bk3=255)   
    {   
       $toWH=$toW/$toH;   
       $srcWH=$this->srcW/$this->srcH;   
       if($toWH<=$srcWH)   
        {   
           $ftoW=$toW;   
           $ftoH=$ftoW*($this->srcH/$this->srcW);   
        }   
        else  
        {   
             $ftoH=$toH;   
             $ftoW=$ftoH*($this->srcW/$this->srcH);   
        }   
       if(function_exists("imagecreatetruecolor"))   
        {   
           @$cImg=ImageCreateTrueColor($toW,$toH);   
           if(!$cImg)   
           {   
               $cImg=ImageCreate($toW,$toH);   
           }   
        }   
        else  
        {   
           $cImg=ImageCreate($toW,$toH);   
        }   
        $backcolor =imagecolorallocate($cImg, $bk1, $bk2,$bk3);       //填充的背景颜色   
       ImageFilledRectangle($cImg,0,0,$toW,$toH,$backcolor);   
       if($this->srcW>$toW||$this->srcH>$toH)   
       {        
           $proImg=$this->CreatImage($this->im,$ftoW,$ftoH,0,0,0,0,$this->srcW,$this->srcH);   
            if($ftoW<$toW)   
            {   
                ImageCopy($cImg,$proImg,($toW-$ftoW)/2,0,0,0,$ftoW,$ftoH);   
            }   
            else if($ftoH<$toH)   
            {   
                ImageCopy($cImg,$proImg,0,($toH-$ftoH)/2,0,0,$ftoW,$ftoH);   
            }   
            else  
            {   
                ImageCopy($cImg,$proImg,0,0,0,0,$ftoW,$ftoH);   
            }   
        }   
        else  
        {   
            ImageCopyMerge($cImg,$this->im,($toW-$ftoW)/2,($toH-$ftoH)/2,0,0,$ftoW,$ftoH,100);   
        }   
        return $this->EchoImage($cImg,$toFile);   
       ImageDestroy($cImg);   
    }   
       
  
    function CreatImage($img,$creatW,$creatH,$dstX,$dstY,$srcX,$srcY,$srcImgW,$srcImgH)   
    {   
       if(function_exists("imagecreatetruecolor"))   
        {   
           @$creatImg =ImageCreateTrueColor($creatW,$creatH);   
           if($creatImg)    
               {
				  
			   ImageCopyResampled($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);  
			   }
           else  
           {   
               $creatImg=ImageCreate($creatW,$creatH);   
               ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);   
           }   
        }   
         else  
        {   
           $creatImg=ImageCreate($creatW,$creatH);   
           ImageCopyResized($creatImg,$img,$dstX,$dstY,$srcX,$srcY,$creatW,$creatH,$srcImgW,$srcImgH);   
        }   
         return $creatImg;   
    }   
       
   //输出图片，link---只输出，不保存文件。file--保存为文件   
    function EchoImage($img,$to_File)   
    {   
       switch($this->echoType)   
        {   
           case "link":   
               if(function_exists('imagejpeg')) imagejpeg($img);   
               else return imagejpeg($img);   
               break;   
           case "file":   
               if(function_exists('imagejpeg')) imagejpeg($img,$to_File);   
               else return imagejpeg($img,$to_File);   
               break;   
        }   
    }   
} 
/*
$pics=new   CreatMiniature();
$pics->srcFile=$SystemConest[0]."/upfiles/201204/1637619_1.jpg";
$pics->echoType="file";
$pics->SetVar($pics->srcFile,$pics->echoType);
$pics->Prorate($SystemConest[0]."/upfiles/201204/1637619_1_m.jpg",$SystemConest["sys_suoluetu"]["w"],$SystemConest["sys_suoluetu"]["h"]);
*/

?>